[support] Using memcached and xcache on a virtual host box that suports 4 Drupal websites.

[Keith Smith]

Thank you!!

On 2015-01-11 07:56, Jamie Holly wrote:
> I handle servers for numerous clients running multiple sites and
> versions of Drupal in VHosts on the same server and it works fine. The
> only thing to keep in mind with memcache is that it is shared, so it's
> best to actually start a different memcache instance per site, just
> using different ports. You can prefix memcache in settings.php, but the
> problem there is that a cache clear will clear everything, just not the
> prefixes.

Ok, makes sense.


> 
> If your running PHP5.5+, then instead of using XCache, I would use the
> Zend Optimizer that ships with PHP5.5+. Performance wise, it's even
> better than XCache. Generally my go to stack is Nginx + PHP w/APC (Zend
> if running 5.5+) + Memcached. WIth that on one client's site, which 
> sees
> over 60,000 pv/hour at peak and over 70 modules (plus being very views
> and panels heavy), even as user 1 I still get load times around 300ms.

What kind of hardware are you running that 60,000 pv/hour site on?


I'm running CentOS 7 that is running PHP 5.4  I may try Nginx.  I was 
told FastCGI will give the same effect.

Ok,  Just to double check, I should be fine running multiple Drupal 
websites in a vhost configuration and use Memcached + Nginx + APC to 
bust performance.

Thanks!!



> 
> Jamie Holly
> http://hollyit.net
> 
> On 1/10/2015 11:56 PM, Keith Smith wrote:
>> Hi,
>> 
>> Thank you so much for all your feedback.
>> 
>> I am planning on running 4 small Drupal websites on a Dell i5 that has 
>> 4
>> cores / 4 threads / 8G RAM.  This is for learning mostly.  The server 
>> is
>> in my home office.
>> 
>> I recently used memcached and xcache to take a Drupal site for one
>> minute page loads to 1 second page loads on a 2 core / 4G RAM VPS.  
>> Very
>> impressive.
>> 
>> I was wondering if I can use these same techniques on a box that has 4
>> Drupal virtual hosts on it.
>> 
>> Any thoughts?  Will I be caching one site to only have to start over
>> when another site gets some traffic?
>> 
>> Thanks
>> 

-- 
Keith Smith